How many chromosome pairs does a human have?
A. 46
B. 50
C. 92
D. 25
E. 23
Answer: E
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What does ricin do in the body? a. Denatures enzymes
b. Increases metabolic reactions. c. Increases the rate at which ribosomes transcribe proteins. d. Increases the rate at which ribosomes translate proteins. e. Inactivates ribosomal function.
Which of the following is a eudicot?
a. palm b. corn c. oak d. orchid e. lily
Compound leaves are defined as being divided into
A. blades. B. companion cells. C. leaflets. D. stomata. E. lateral meristems.
A certain bacterium infects a plant's upper leaves. A few days later, bacteria of the same species attempt to infect the same plant's roots but are unsuccessful. What process is responsible for the plant's ability to prevent this infection?
A) antivirulence response B) pathogenesis resistance C) systemic acquired resistance D) sequential immunity